Factual error: There were no SS in North Africa, as shown iat the beginning of the film. There was a small SD office in Tunis. If there had been, SS would not have paraded around in Black, or normal field grey for that matter, they would have worn most likely a tropical uniform.
Character mistake: Max back in London is referred to as Group Captain, but his RAF Rank shows him as a Squadron Leader.
Factual error: It is 1943, but the bathroom in which the pilot is throwing up is completely fitted with PVC drains and copper quick couplings. Neither existed at the time. (01:14:45)
Factual error: Max tells Marianne he plans to buy a ranch at the end of the war in Medicine Hat, Saskatchewan. Medicine Hat is in Alberta.